1.

I : The points (-2,3,5 ), (1,,2,3 ),(7,0,-1 ) are collinear. II: The points (2 ,-1,1 ) (1-3-5 ), (3,-4,-4 ) form an equilateral triangle.

Answer»

collinear
vertices of a RIGHT ANGLED triangle
vertices of an EQUILATERAL triangle
vertices of an ISOSCELES triangle

Answer :A


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